#include <stdio.h> void setlinebuf(FILE *file);
This function modifies the buffering characteristics of file.
First, if the file already has a buffer, it is freed. If there was any
pending data in it, it is lost, so this function should only be used
immediately after a call to fopen.
Next, a buffer is allocated and the file is set to line buffering.
See section setbuf. See section setlinebuf. See section setvbuf.
None.
not ANSI, not POSIX
setlinebuf(stderr);
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